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Re: [CanonDigital SLRs] Calibration?
Fri Jun 26 17:00:32 2009
Thank you for that info. I already knew most of that. I have a calibration
target designed for precision telescopes. Oddly, the amount of focus
degradation is dependent on F-stop setting. On my kit lens on the 20-D, the
ideal spot is about F4 (still out of focus) and it gets worse in both
directions from there. The L-series is at about F-8. My Olympus point-and
shoot is dead on crisp at all F-stops.
I've been on the Canon website, and don't see anything about calibration or
about sending to them. I'll look again at the website.
--- In [EMAIL PROTECTED], Chuck Norcutt <[EMAIL PROTECTED]> wrote:
> You'll have to send it to Canon for calibration. It's not something you
> can do yourself. The 5D MkII and 50D both offer "AF micro adjustment"
> which allows the user to individually calibrate focus setting
> adjustments for up to 20 lenses. But not for earlier cameras,
> But first do some very rigorous tests to prove that it's the camera.
> Set it on a tripod and use a target with good contrast. If that doesn't
> work then it's surely the camera. If it does work you may have to
> examine your modus operandi. First thing that comes to mind is multiple
> focus points. I only ever use the center focus point because otherwise
> I'm really not sure all the time what the camera chose to focus on.
> There may be more causes as well. I know it's hard to question you own
> techniques (especially if you're a well experienced photographer) but
> sometimes it just turns out that, as Pogo said: "We have met the enemy
> and he is us". (I hope I got that quote right) :-)
> Chuck Norcutt
> hut2three wrote:
> > My 20D always shoots just a little out of focus. All lenses, same
> > problem. It's irritating.
> > I don't know of anyone else with this problem, and can't find any
> > information on calibrating the focus. I might have to scrap it, and just
> > buy new, but I like having the extra body at no additional cost.
> > Anyone help?
> > Hut
> > Hut Photographic, Inc.
> > Jefferson, NJ
> > http://www.modelharmony.com/HutTwoThree
> > <http://www.modelharmony.com/HutTwoThree>